baber/WOPTO huggingface dataset:
Patent GB-290239-A (GB)
Title: Improvements in or relating to acoustic devices such as loud speakers
IPC: H04R9/06
Filed: 1928-02-11
Abstract: 290,239. Electrical Research Products, Inc., (Assignees of Harrison, H. C.). May 11, 1927, [Convention date]. Loud-speakers; diaphragms; magnetic instruments. - An acoustic device comprises a long .direct acting diaphragm tensioned in the direction of its length only and to such a degree that the velocity of propagation of transverse waves therein in this direction is greater than one-fourth the velocity of sound in air. Preferably, the diaphragm is tensioned to such a degree that the velocity of propagation therein is substantially equal to that of sound in air so that sound waves radiated from various portions thereof along a line extending in the direction of its length are substantially in phase. The length of the diaphragm is preferably greater than twice its width and also greater than half the wave length of the lowest frequency to be radiated. The driving element for the diaphragm is connected thereto by means of a distributing system adapted to propagate energy therethrough at a velocity comparable with that of propagation of sound in air. In the construction shown, the flat diaphragm 11 has its lower edge clamped by screws 14 between the serrated surfaces of a member 13 and of a projecting portion 12 of a frame 10, the upper edge of the diaphragm being similarly clamped between the serrated surfaces of members 15, 16 by screws 17. Rods 18 secured to the member 15 and passing through holes in a projecting portion 19 of the frame 10 are provided with compression springs 20 and nuts 21 for tensioning the diaphragm. Damping strips 40 of felt &c. connect the edges of the diaphragm with the frame 10. An electromagnetic unit 22, secured to cross members 23, 24 on the frame 10, is connected with the diaphragm by means of a rod 30 and arm 29 which is rigidly secured to a tubular member 25 extending parallel to the diaphragm between its opposite edges. Diametrically opposite portions of the member 25 are connected by narrow strips 26, 27 of flexible material such as paper, to the diaphragm and a rigid support 28 respectively. The strips 26, 27 may either be continuous, or a plurality of separate strips may be used. The Specification as open to inspection under Sect. 91 (3) (a) describes a modification in which a driving element is connected to a long laterally pleated diaphragm, secured at its periphery, by means including a tubular member extending in the direction of its length. This subject-matter does not appear in the Specification as accepted.
Patent GB-494875-A (GB)
Title: Improvements in or relating to lintels in the construction of buildings
IPC: E04C3/02
Filed: 1938-02-11
Abstract: 494,875. Lintels. TIMM, G. Feb. 11, 1938, Nos. 4390 and 4391. Convention dates, Feb. 25, 1937 and Oct. 29, 1937. [Class 20 (iv)] A concrete or like lintel a consists of a beam provided at each end with an abutment b for supporting the ends of a superposed brick or masonry arch. The beam may be of square cross-section and reinforced by two pairs of metal rods d, e. The abutment b may be of single inclined form as shown in Fig. 1, or it may be subdivided into two or more inclined parts, as shown in Fig. 3. The abutments shown in Fig. 1, are of the same depth as the arch, and those shown in Fig. 3, are half as deep as the arch.
Patent GB-633287-A (GB)
Title: Improvements in bi-frequency magnetic testing apparatus
IPC: G01N27/90
Filed: 1948-02-16
Abstract: 633,287. Magnetic tests and measurements. MAGNETIC ANALYSIS CORPORATION. Feb. 16, 1948, No. 4499. Convention date, June 17, 1944. [Class 37] In a device for testing for flaws in magnetic materials in which spaced portions of the material are inductively excited by alternating currents, and the outputs from pick-up coils associated with the respective portions are compared, the alternating currents differ substantially in frequency to minimise coupling between the circuits associated with the respective portions. As shown, tuned exciting coils 11, 111, energized by oscillators 1, 101 through buffer amplifiers are associated through the material 13 under test with pick-up coils 14, 114, whose outputs are rectified by the tubes 15, 115, and balanced in a resistor 16- 116 with variable tappings to balance out inequalities in the exciting and pick-up channels. The resultant voltage, after amplification if desired, affects an indicator 24 of microammeter type, or a cathode-ray oscillograph. A steady field may be provided at the spaced portions by coils 27, 127. To reduce the risk of coupling, separate anode supplies are used for the two exciting channels and the output amplifier 22. The buffer arrangements shown in rectangle 12 may be omitted or replaced by networks in which reverse retroaction occurs at all frequencies except that to be passed on.
Patent GB-400055-A (GB)
Title: Process for producing a green covering of porous material for the top covering of playgrounds
IPC: E01C13/06
Filed: 1933-02-14
Abstract: A top dressing for playgrounds comprises finely-disintegrated pumicestone or the like dyed green by means of an alcoholic solution of a tar dye.
Patent GB-165719-A (GB)
Title: Improvements in or relating to valve apparatus for rock drills and like fluid pressure operated tools
IPC: B25D9/18
Filed: 1921-02-08
Abstract: 165,719. Rayner, G. H. T., and Rayner, P. Feb. 8, 1921. Fluid-actuated gears.-In a percussive tool, the fluid supply to the cylinder ends is controlled by the central head of a valve s with three equal heads, and the exhaust is controlled by the piston passing ports c, d. To throw the valve, its ends are alternately put to pressure and exhaust by ports g, h controlled by the piston. The valve is locked in its end positions by reduced pressure produced by fluid alternately fed through ports q, r in the end valve-heads to the end chambers which are constantly open to exhaust through ports t, u, and intermittently through ports g, h. In a modification, the supply for locking the valve is fed through ports in the casing controlled by the valve, and discharged through ports g, h, c, d connected by a groove in the piston; and the ports t, u are dispensed with.
Patent GB-1419988-A (GB)
Title: Letting-out of hides
IPC: D05B15/00
Filed: 1973-01-30
Abstract: 1419988 Letting out hides K RABANUS 30 Jan 1973 [31 Jan 1972] 4568/73 Heading B4B Apparatus for letting out hides forms a cut across the hide, moves the hide parts so formed relative to each other along the line of the cut to stagger them, sews the parts together and then repeats the process on lines parallel to the cut along the length of the hide. The apparatus comprises plates 2, 3 capable of clamping a hide against upstanding portions of a base 4, a slotted guide 6 through which a rotary knife 14 operates while travelling along a parallel guide 13 and sewing means 20 movable stepwise along a guide 13<SP>1</SP>. A carriage 9 with hair parting means in the form of a projection or air nozzle is movable parallel to the guides between the plates 2, 3 and may also rise and fall. In operation as shown, a hide 1 is fed diagonally between the plates 2, 3 and base projections and clamped between them. The carriage 9 then travels along to lie between the plates and part the hairs beneath the slot 7 and rises to tension the hide, Fig. 4. The knife 14 passes along the slot 7 entering a slot in the hair parting means to cut the hide. One plate is then moved longitudinally of the other, taking part of the hide with it and then approaches the other plate, the carriage having withdrawn, to clamp the cut margins, Fig. 5. These are sewn, the hide released and fed forwards and the sequence repeated. In another embodiment, Fig. 6 (not shown) two hide portions are processed simultaneously, one plate being divided transversely to form, in effect, two independently operable halves (19, 19<SP>1</SP>) beneath which the hide portions are fed diagonally and obliquely to each other. Other elements of the apparatus operate on both hide portions as before. In other arrangements, the hide portions may be manipulated by spiked rollers (not shown) replacing the planes 2, 3 or fed by a spiked reciprocatable and pivoted bar (22), Fig. 7 (not shown).
Patent GB-1078578-A (GB)
Title: Improvements relating to graphite
Inventor: BOND RAYMOND LESLIE
IPC: C01B31/00
Filed: 1964-02-03
Abstract: A graphite artefact is made by mixing a coke grist with a chloroform extract of coal having a m.p. between 50 DEG  and 180 DEG  C., shaping carbonizing and graphitizing.  The article may be impregnated one or more times with a hydrocarbon, e.g. pitch tar, after carbonizing, the article being rebaked after each impregnation. The extract can be made by shock heating coking coal, e.g. to at least 350 DEG  C., and boiling this coal with chloroform then evaporating. In the example a ground mixture is moulded at 20 tons/sq. inch and 130 DEG  C. then carbonized at 920 DEG  C. with a rate of temperature rise \sO 6 DEG  C. and graphitized at 2800 DEG  C., heating taking 3 1/2 -5 days with cooling to 1000 DEG  C. in 2-3 days.  The product has 85% of the pore entrance diameters in the range 2-6m  and <3% of the diameters >10m . The bulk and helium densities of the product are 1.53 and 2.20 g/c.c. respectively.  The Specification also discloses the use of an anthracene oil extract instead of the chloroform extract.
Patent GB-456837-A (GB)
Title: Improvements in devices for measuring electric oscillations
IPC: G01R13/20
Filed: 1935-02-13
Abstract: 456,837. Oscillographs; magnetic measurements. HARTEL, H. VON, 35A, Berlinerstrasse, Zehlendorf, Berlin. Feb. 13, 1935, No. 4655. Void [Abridged as open to inspection under Sect. 91 of the Acts, Aug. 14, 1935]. [Class 37] [See also Group XXXIX] Apparatus for measuring the amplitude and frequency of electrical oscillators consists of a cathode-ray tube, oscillator generator, amplifier, batteries &c. mounted in compartments on a single base-board. The process appears to consist in producing oscillations by means of a circuit of known type and comparing them with the oscillation to be measured, but the details are unintelligible. Figs. 5 and 6 show means for converting mechanical vibrations into electrical oscillations to be measured by the apparatus. The needle 1 rests on the surface, the vibrations of which are to be measured. In the arrangement shown in Fig. 5 the needle 1 is pivoted at 3 to a bar supported at its ends in rubber sleeves 7. To the bar is connected a lever 4 carrying at its end a coil 5 moving between the poles of a permanent magnet 9. Fig. 6 shows apparatus for measuring vibrations in azimuth. The needle 1 carries a coil 5 moving opposite to the poles of a magnet 9. The needle is pivoted at 3 to a casing 6 which, with the magnet 9, can be rotated in azimuth by a worm 8. To measure magnetic fields a device is employed comprising a coil rotated in the field by an electric motor.
Patent GB-984079-A (GB)
Title: Automatic device for stopping a sewing machine
IPC: D05B51/00
Filed: 1964-02-04
Abstract: 984,079. Sewing machines. NECCHI S.p.A. Feb. 4, 1964 [April 11, 1963], No. 4660/64. Heading D1G. A sewing machine is provided with stopping means comprising a normally-open first electrical which closes upon interruption of the thread supply to influence a second electrical circuit controlling means thereupon adapted to stop the machine. The secondary of a transformer 2 is connected both to the filament 8 of a thyratron 9 and also to a rectifier 5. The positive terminal of the latter is connected via a normally closed switch 13 and a solenoid 15 to the anode 17 of thyratron 9. The negative terminal of rectifier 5 is connected via a resistance 23 to the control grid 24 of thyratron 9. Resistances 21 and 22 are connected in series across the negative and positive terminals of rectifier 5, and the junction of said resistances is connected to earth via lines 25 and 48. Grid 24 is connected via a line 31 to a brush 35 bearing on a disc which is fast with the arm shaft 36 of the sewing machine 47, and which comprises an insulating segment 32 and a conducting segment 33. A brush 34 bearing on said disc is connected via a line 41 to a contact 43 associated with a thread tensioner 42. The check spring 44 of the latter is electrically connected via a contact 45 to an earthed line 46, and normally engages contact 43, but is drawn away therefrom each time the take-up exerts a pull on the thread A. The arrangement is thereby such that, when the machine is running normally, a negative bias is applied to grid 24 to prevent flow of current through thyratron 9, while contacts 33, 34, 35 and contacts 43, 44 are never closed simultaneously. If the needle thread supply is interrupted, contacts 43, 44 close permanently, and when contact 33 next bridges contacts 34, 35 a first circuit is completed via the earthed lines 46, 48 to remove the negative bias from grid 24, whereby thyratron 9 fixes to energize solenoid 15 via a second circuit, and the armature 40 of solenoid 15 shifts the belt 39 from the fast pulley 38 to the loose pulley 37. The machine is re-started by manually opening switch 13.
Patent GB-871704-A (GB)
Title: Plastic bowling ball and method of making same
IPC: A63B37/00
Filed: 1960-02-10
Abstract: 871,704. Balls for skittles. BRUNSWICKBALKE-COLLENDER CO. Feb. 10, 1960 [March 9, 1959], No. 4663/60. Drawings to Specification. Class 132(2). A ball for skittles consists of a sawdust core impregnated with a rigid polyester resin and a flexible cured polyester cover. Colouring may be applied to the core or in The material of the cover. The core may be heavier in the half to be provided with fingerholes so that the final ball is balanced.
Patent GB-1011444-A (GB)
Title: Improvements in control cable seal
IPC: F16C1/26
Filed: 1964-02-04
Abstract: 1,011,444. Bowden mechanisms. AMERICAN CHAIN & CABLE CO. Inc. Feb. 4, 1964 [March 21, 1963], No. 4672/64. Heading F2K. In a Bowden cable assembly comprising a core 10, a tubular casing 11, and an annular anchorage or end fitting 13 secured to an end of the casing 11, an annular sealing element 19 of an elastomeric material, e.g. neoprene, is housed within an axial extension 16 of the fitting 13 and is in moisture sealing engagement with the core 10 and the extension 16. The sealing element 19 is in sliding engagement with the core 10 and the bore of the extension 16, and includes a circumferential rib 20 received with axial and radial clearance in an annular groove 17 in the bore of the extension 16, an inward end flange 18 on the extension 16 preventing exposure of the sealing element. In assembling the cable, the sealing element is pushed into position inside the fitting 13, which is then swaged to the casing end. The core is fed through the casing and sealing element and an end ball swaged on. The anchorage fitting 13 may be secured in a frame by a spring clip 14a.
Patent GB-249649-A (GB)
Title: Improved device for gripping or holding ropes
IPC: B66B5/18
Filed: 1925-02-20
Abstract: 249,649. Bullivant, A. W., Bullivant, T., and Pattisson, E. L., (Executors of Bullivant, F. A.), and Selby, G. M. Feb. 20, 1925. Rope grips.-In rope grips of the kind comprising hinged members A, A<1> and clamping means for forcing them into engagement with the rope C, the hinge pin B is provided at one end with an eye b for attachment of the device to a fixture.
Patent GB-1338477-A (GB)
Title: Bituminous emulsions
IPC: C08L95/00
Filed: 1971-02-16
Abstract: 1338477 Bitumen-block copolymer emulsions SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 16 Feb 1971 4736/71 Heading C3P [Also in Division B1] An aqueous bituminous emulsion suitable for use in road building, roofing and as a pressure sensitive adhesive comprises, (a) a bituminous component whose aromaticity expressed as the fraction of aromatic carbon of the n-heptane maltene phase (f a ) is higher than (0À004 x P) + 0À280, in which P represents the weight percentage of n-heptane asphaltenes in the bituminous component, (b) a block copolymer of general formula A-B-A in which the A's are identical or different thermoplastic, non- elastomeric polymer blocks prepared by polymerization of one or more monovinyl aromatic components and in which B represents an elastomeric polymer block prepared by polymerization of one or more conjugated diene, optionally with one or more monovinyl aromatic compounds, (c) an emulsifier and (d) water. B may be partly or completely hydrogenated. Block polymer component A may be polystyrene or polymethylstyrene. Block polymer component B may be polyisoprene, polybutadiene or a styrene/butadiene copolymer. The emulsifier may be anionic, cationic, non- ionic, a solid powder or cationic and non-ionic mixtures. Anionic emulsifiers mentioned are soaps, e.g. alkali salts of fatty acids, resin or naphthenic acids, and alkaline proteins, such as caseinates. Cationic emulsifiers mentioned are salts of mono- or poly-amines with an alkyl chain containing at least 10 carbon atoms and a hydrochloric or acetic acid or a pyridinium salt or quaternary ammonium salt with similar alkyl chains. The solid powder may be bentonite. Fillers, antioxidants, mineral salts, cellulose derivatives, calcium chloride, adhesives, volatile solvents may be added to improve emulsion characteristics.
Patent GB-233811-A (GB)
Title: Setting combs for use in hair waving and the like
IPC: A45D2/44
Filed: 1924-02-26
Abstract: 233,811. Sartory, P. Feb. 26, 1924. Combs, hair.-Combs 1, 2 for use in setting waved hair are made with clips or sockets 3 on the comb 1 adapted to receive and frictionally engage the end prongs 4 of the comb 2, the sockets and end prongs being of the same length as the teeth of the combs, and the teeth of the two combs are staggered so as to intermesh when the combs are in position in the hair. The combs may be made of any shape or pattern.
Patent GB-176632-A (GB)
Title: Improvements in and relating to artificial arms
IPC: A61F2/58
Filed: 1921-02-11
Abstract: 176,632. Steeper, H. Feb. 11, 1921. Limbs, artificial.- Means for connecting a hand to an artificial arm comprise a spring - urged plate 12 carried by the forearm 7 and engaging a circumferential groove 4 on a pin 3 projecting from the wrist plate 1 of the hand 2 and a U-shaped member 9 carried inside the forearm and actuated from the exterior thereof bv a screwed rod 10 to embrace the pin and to clamp the hand in any desired position. The plate 12 may be retained out of engagement with the pin 3 by rotating the head 15 screwed thereon until a rectangular projection 14 is in such a position that it will not pass through a hole in the forearm casing 6.
Patent GB-525095-A (GB)
Title: Improvements in or relating to abrading tools
IPC: B24D7/06
Filed: 1939-02-16
Abstract: 525,095. Grinding-tools. TENNANT, W. J. (American Optical Co.). Feb. 16, 1939, No. 5033. [Class 60] [Also in Groups II, IV and V] An abrading tool comprises an abrading layer 2 formed of a mixture of abrasive particles, for example, carborundum or diamond, and metal particles, the mixture being pressed in a mould and heated to sintering temperature, the operation being so conducted as to render the body porous, and a second layer 1 composed only of the bonding material integrally joined to and constituting a permanent support for the layer 2, and a third layer composed of a solid metallic material having one surface shaped to engage and be detachably secured to the second layer and the other face shaped for mounting on a spindle during abrading action. The abrading face 2 is subsequently, or during formation, hardened and may be ground or treated with acid to expose the abrasive particles. The body 1 may have a central aperture registering as shown in Fig. 2, with a spigot on a support 6, to which the body is secured, for example, by screws 7. In a modification, Fig. 5, the body 13 has therein grooves 12 in which are moulded or secured by solder, abrasive portions 10 formed as described above, and in a further modification the abrasive members are in the form of plugs secured in holes in the body. The body may have in its surface spiral or other grooves running in a generally radial direction to receive and eject abraded material. The portion 2 may be thin and may be soldered to the body 1. The metal bonding material may be particles of alloy comprising 80 per cent. copper, 5 per cent. tin, and 15 per cent. nickel. 25 carats of diamonds may be incorporated in each cubic inch of the abrading layer. Beryllium or other bronze, copper, iron and iron alloys, especially nitralloy may be employed: The particles may be pressed cold in a metal mould or hot in a graphite or ceramic mould. When the copper-tin-nickel alloy is used the pressure applied is from 5 to 10 thousand pounds per square inch and the mixture is heated whilst held under pressure to between 1,500‹F. and 1,700‹F. The material sold under the Registered Trade Mark " Bakelite " or rubber compositions or a synthetic resin such as methyl-methacrylate may be employed as a bond. Soluble particles are mixed with the resin prior to polymerization when a porous bonding is required.
Patent GB-306487-A (GB)
Title: Improvements in or relating to directional wireless signalling
IPC: G01S3/12
Filed: 1929-02-15
Abstract: 306,487. Brandes, Ltd., (Assignees of Kolster, F. A., and Kruesi, G. G.). Feb. 21, 1928, [Convention date]. Directive signalling; thermionic generators. - A uni-directional aerial system comprises a combination of three antennae 11, 12, 16, Fig. 1, of which the members 11, 12 are preferably combined to form a loop. The member 16 is shunted across the loop at a point nearer the conductor 12 than 11. As the junction is not a nodal point, current flowing on the conductor 11 will divide between the conductors 16 and 12, the phase of the current in the former being shifted through a definite optimum angle relative to that flowing in the latter by means of a capacity reactance 19, and also by adjusting the three-plate condenser 17, 18. The combined effect of the currents in the conductors 16, 12 is equivalent to an imaginary conductor B at a distance d from the conductor 11, carrying a current substantially equal to that flowing in the branch 11 but dephased by a definite angle. This arrangement produces a cardioid curve of radiation, the main axis of which can be warped or shifted by adjusting the capacity reactances. The aerial system may be energized by a valve oscillator 21 with capacity back-coupling through a tuned loop 22 and condenser 28, and a signalling-key 23 inserted in the plate circuit, the high-tension supply being protected by chokes 24. The aerial conductor 11 is directly connected to the highpotential end of the plate inductance 22, the other side of the aerial system being coupled by distributed capacity. Various modified forms of coupling are described, Fig. 10 showing an arrangement for permitting the directional loop to be rotated through brush contacts 40. The loop as a whole is preferably less than one quarter of the working wave-length, the distance between conductors 11 and 12 being from one-tenth to one-fifteenth of the wave-length.